You're right Kenny, one of the triggers is indeed missing, I've been looking for it ever since acquiring the gun! Even though it has only half-enough triggers the lone trigger has never failed. Not all Parker Repros with single triggers have problems!
Although each of these stocks have their own characteristics, I believe all are Claro. I've previously posted the pic below of my Po' Man's Parker 28/.410 set (a 28 ga. 2-bbl.set with a set of 28-.410 Chambermates), but include it here to show another very unique piece of Claro. An old "wood guy" told me this particular grain pattern is called "Quilted Claro", the checkerboard look changes when you view the wood from different angles--the darker areas turn lighter and the lighter areas turn darker.